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In this paper, a new single element wideband cavity backed multi-layer microstrip patch antenna is presented. For this antenna, rectangular patch and circular cavity has been used. This antenna is designed for 79 GHz short range radar applications, and is fabricated with advanced high resolution “Any-Layer” PCB technology. It has a wide bandwidth of 12.44 GHz, which is 15.6% of the center frequency...
In this paper, new wideband cavity backed aperture coupled microstrip antenna is presented for 79 GHz MIMO radar applications. This designs is based on a sub-arrays consisting of two single elements, which have stacked rectangular patch radiators. A microstrip to stripline transition and a series feeding topology is used to feed the elements. The antennas are manufactured by using a new high resolution...
In this paper, a new cavity backed microstrip patch antenna sub-array, which is fabricated in an advanced high resolution multi-layer PCB technology is presented. This sub-array consists of two corporate fed elements. To reduce backside radiation, a microstrip to stripline transition is used for connecting the IC's on the other side of the board. This antenna is designed for 79 GHz radar applications,...
This paper presents a calibration method for broadband dielectric spectroscopy of micro-liter samples of biological liquids with transmission line sensors up to 110 GHz. The method uses water and methanol as calibration liquids to perform a probe-tip-to-liquid calibration without prior knowledge of their complex permittivity. Extracted complex permittivities of the calibration liquids show good agreement...
This paper reports on dielectric spectroscopy for microliter liquid samples using reference materials. In order to fully determine the calibration coefficients, air and water are used as known reference materials, while methanol is used as an unknown material, which is also used to validate the approach up to 5 GHz for which reference data is available. The method is then used up to 110 GHz for yeast...
This p aper deals with the measurement of cell suspensions at millimeter wave frequencies between 30 GHz and 110 GHz using a CPW test fixture and an on-wafer network analyzer set-up. The measurement results show that yeast cell suspension with concentration as low as 4 million cells/ml or 4 cells/nl can be distinguished from water by their dielectric constants at millimeter wave frequencies. High...
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